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#33357 01/17/2004 2:01 PM | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | All you 261 Stovebolters: I need to pick your brains. We are in the process of cleaning parts for a '62 261. The dirt/oil/grease combination has formed a coat that has actually preserved the outside of this engine. This was a West Texas ranch truck and only got washed when it rained, and from the looks of the engine, the oil was not changed much, just more added to make up for the leaks.  It's incredible. After cleaning the exhaust manifold, we noticed two small cracks on the outside corners of the two inside "stacks", where the "stack" meets the "pipe". The cracks are about 3/4 inch long. We think we can weld it up and it will be fine. Are these cracks unusual for a 261 or is it common? Has anyone else seen this? :confused: The bi-metallic spring for the heat-riser is missing. Any idea where we can find one? Any help would be great. Thanks, Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
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#33358 01/17/2004 2:09 PM | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | 51bolt,
Chevy Duty has the heat-riser spring: Part # 89-425 (American Class Truck Parts, who sponsors this site, does not seem to have the part - I always check there first). Someone might know the NAPA part number and will post it here.
None of my 235/261 manifolds have the cracks you describe. I do not know if such cracks are unusual.
Tim | | |
#33359 01/17/2004 4:44 PM | Joined: Dec 2001 Posts: 1,745 Member | | Member Joined: Dec 2001 Posts: 1,745 | Send the manifold to Kansas Kustoms and he will not only repair it but make it into a beautiful dual exhaust. When I took mine off the 235 I also found a crack and he sold me one for $15 it would have cost me almost that much to send him mine so price ended up the same. [img] http://www.angelswest.com/_borders/kansaskustoms.jpg[/img]
54 3100 with 235
62 flatbed dump C60 with 261
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#33360 01/19/2004 12:14 PM | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Thanks guys for the help. I'll pass it along.
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
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#33361 01/19/2004 4:54 PM | Joined: May 2001 Posts: 1,904 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,904 | The previous owner of my 261 had the heat riser spring on backwards. Wouldn't that lead to very slow intake warmup followed by a carb that was hotter than heck?
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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#33362 01/20/2004 2:22 AM | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Hey Wally-
I think that it would not work at all. I think that it would hold the butterfly closed because it's in backwards and as it heated it would try to close it further. Once it heated, I think it would run okay, but when it's cold, it would run rough. I could be wrong, and I'm sure someone else who has more experience will come along and give you a better answer, but if the spring is in backwards, I think that is what would happen.
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
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